World Trade Center Memorial Foundation President Gretchen Dykstra is coming under fire from several of the group’s board members who say she’s done far too little to raise $500 million for the project, The Post has learned.

“There is a general frustration that we are almost a year into this and we haven’t seen any leadership from Gretchen,” said one key board member. “She’s the head of the foundation and making $350,000 and she hasn’t moved the ball forward.”

In its first year of operation, the foundation has managed to raise just $130 million and just $28 million of that in the past six months.

Another $200 million in the foundation’s budget was allocated by the Lower Manhattan Development Corp. out of the agency’s federal funding.

The board member said that after last week’s meeting of the foundation’s board, several of the trustees left feeling exasperated that “no comprehensive plan was presented.”

“We should be out there with a national campaign,” said the board member. “We’re coming up on the fifth anniversary [of 9/11] and where’s the fund-raising campaign? There’s only one fifth anniversary.”

The 30-member blue-ribbon panel includes some of the city’s most influential financiers, builders and executives as well as 9/11 victim relatives.

“I don’t think we’ve done a great job of making the public aware of what’s going on down there,” a second board member said. “It’s a beautiful memorial. And we haven’t done a national campaign yet. That needs to be done, don’t you think?”

The second board member conceded that there have been difficulties, from political squabbles to a lawsuit filed by some relatives who don’t like the memorial, in addition to competing fund-raising campaigns for Hurricane Katrina.

“But it’s one thing to let excuses hold you down and another to see your way through it,” said the second board member.

“There probably are board members who feel frustrated by her. It doesn’t seem she’s putting her energy in the right places. What has she done and what has she accomplished?”

A foundation spokeswoman said the criticism was unfounded.

“This is surprising because the facts are that in less than a year the foundation has over 9,000 donors and has received donations from all 50 states and 11 different countries. These issues have never been raised at a board meeting,” the spokeswoman said.

Also springing to Dykstra’s defense was Debra Burlingam, a member of the foundation board who said Dykstra “has been phenomenal” since her appointment.

Burlingame said any critics are merely doing the bidding of elected officials who have failed to pull together rebuilding plans at the World Trade Center – a failure that she said has made it far more difficult to raise money for the memorial.

“This is clearly scapegoating to take attention away from their ineptitudes,” Burlingame said.

The foundation has reached out to the public through the Web site, two direct-mail campaigns and the New York State tax checkoff. A national advertising campaign is set to begin by summer.